684034999 has 2 divisors, whose sum is σ = 684035000. Its totient is φ = 684034998.

The previous prime is 684034997. The next prime is 684035003. The reversal of 684034999 is 999430486.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 684034999 - 2¹ = 684034997 is a prime.

Together with 684034997, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (684034993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 342017499 + 342017500.

It is an arithmetic number, because the mean of its divisors is an integer number (342017500).

Almost surely, 2^684034999 is an apocalyptic number.

684034999 is a deficient number, since it is larger than the sum of its proper divisors (1).

684034999 is an equidigital number, since it uses as much as digits as its factorization.

684034999 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1679616, while the sum is 52.

The square root of 684034999 is about 26154.0627627908. The cubic root of 684034999 is about 881.1018390892.

The spelling of 684034999 in words is "six hundred eighty-four million, thirty-four thousand, nine hundred ninety-nine".